Lock



Patented Oct. 27, 1925.

.LOGK.

-Lpp1ieation filedrianuary 17,1924. Serial No. 686,727

' ToaZZ whom ia ma g concern:

Be It known that I; BENJAMIN SIMONO- virs. a citizen of the United States, residing at New 'ork, county of New York, .and' State of New York; and iI, dAcon'FIsoHnn, :a citizen (if-the Republic of Hungary, residingat -New Yorlgcounty-o'f New York, and State; of New Yorkfhave invented certain new-and useful Improvements-in Locks, of which the following is a specification.

This invention-relates :to improvements in lo'cks, particularly to suchaskare :used in connection with swinging doors, and generally known as mortice locks, due to their being inserted in the-structure of :the door.

One of theob'jects-of the invention is to provide a. lock adapted to be operated by a key. of special construction, resisting all types of ordinary keys.

Another purpose is to produce a lock so arranged as to bafiie surreptitious attempts at unauthorized opening.

A further aim is in the provision of a lock that is essentially simple and inexpensive to construct and which performs its function in an effective manner.

These and other similar aims and objects are attained by the novel construction and combination of parts hereinafter described and shown in the accompanying drawing, forming part hereof, and in which Figure 1 is a side view f a lock construct-.

ed in accordance with this invention.

Figure 2 is a view similar to Fig. 1 showing the outer cover, or escutcheon plate removed.

Figure 3 is a similar view showing a portion of the lock cover plate broken away to illustrate the details f construction.

Figure 4 is a vertical sectional view taken on line 41-4 of Fig. 1.

Figure 5 is a detail perspective View of the lock actuating barrel.

Figure 6 is a side view of the key.

Figure 7 is an end view'of Figure 6.

Referring to the drawings in detail, the numeral 10 designates the lock housing provided with a cover plate 11 in which is provided a key hole 12 of the ordinary type.

Rotatably mounted in an opening 13 on the inner or back wall of the lock housing 10 and extending through the enlarged opening of the keyhole slot, '12, is a sleeve or barrel 14, provided with a longitudinal slot 15 of a width to readily accommodate the key .bit which .will 'bemore fullyhereina-fter described.

Extending:outwardly in aplaneat aright angle toithe longitudinal :axis ofthe barrel .isan arm '16 which is slotted'asat 517 in such manner 'that-theawalls 10161118 slot lie fius'h with the walls of the slot 15asclearly shown iniEig. 5. i

Asshown, the arm 16is-of less avidth than the 2length :of the sleeve and is adapted to operate within .the confines-of the lock :housing 10 .as shown .in Fig. 4.

In order .that the slot '15 may ibe .held .in

:proper-iposition to receive the :key upon its linitial 1111261131011, the sleeve .18 iprovided with an enlargement 14 provided on one side and adjacent one end thereof with a flat portion 18 Which is adapted to be engaged by a leaf spring 19 secured to the housing 10 in any convenient manner.

Secured to the cover plate 11 is a housing 20, the outer side of which is formed with an L-shaped keyhole slot 21. Arranged within said housing 20 is a cam 22 for a purpose to be more fully hereinafter described.

The key illustrated in Figures 6 and 7, comprises a shank 23 provided with an articulated bit 24, the hinged portion 25 of which is limited in movement in'a clockwise direction, as viewed in Figure 7, by a stop member 26 in the form of a small plate one end of which is fixed to the shank of the key while the other end overlaps the hinged end between the parts 24land 25.

The operation is as follows The key is held so that; the bit lies in a horizontal plane with the hinged member depending therefrom. It is then inserted into the L-shaped keyhole slot 21 and the shank enters the sleeve or barrel 14. The key and barrel are then turned in a clockwise direction until the bit elements lie in the :same plane, after which the key is pushed further in and through the keyhole slot 12 of the plate 11.

Upon entering the housing 10, the key bit will be received in the slot 17 and the bit elements will be held rigid and in position to engage and operate the lock bolt 27 which is slidably mounted in the housing and provided with a notch 28 designed to be engaged by the free end of the bit element 25 as the key is turned. By turning the key in a counterclockwise direction the bolt may be projected to a locking position and there- PATENT QQFiF- l-KCIE.

after a continued rotation of the key in the same direction Will again register the bit with the key hole slot 12.

VVithdraWal of the key is then accomplished by moving the bit out of the slot 17, through the slot 12 and into the housing after which the key and sleeve are again rotated in a counter clockwise direction bringing the hinged portion of the bit into contact With the cam 22 and causing the bit to fold into original position When it may be Withdrawn through the L-shaped keyhole slot 21. The unlocking of the door may be accomplished by a rotation of the key in a clockwise direction after the bit has been inserted through the key hole 12 as previously described.

Although the foregoing is descriptive of the preferred embodiment of the invention, it will be apparent that minor changes may be made in its construction, Without the exercise of invention or conflicting with the scope of the claims hereto appended.

Having thus described our invention, What We claim as new and desire to secure by Letters Patent, is

1. A lock provided with a plurality of keyholes, each of a different contour a key having an articulated bit adapted to enter through said keyholes, and a key receiving barrel Within the lock for receiving the key bit and retaining the same rigid.

2. A lock provided with a plurality of keyholes, each of a different contour, a key having an articulated bit adapted to enter through said keyholes to operate the lock,

and means to properly shape the key prior to its entrance into or Withdrawal from each keyhole.

3. A look provided with a plurality of key holes each of different contour and each capable of successively receiving an articulated key bit, means in one key hole to properly shape the key as the same is rotated therein, and means in the other key hole to rigidly maintain said key in such shape as it is turned to operate the lock.

In testimony whereof We have aflixed our signatures.

BENJAMIN SIMONOVITS. JACOB FISCHER. 

